# SDR HEEA2011121132678

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 1, 2011
- Submitted: December 12, 2011
- Operation: Air carrier
- Aircraft: N435PH
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53891
- Aircraft time: 4,772 hours
- Engine: Allsn 250C47B
- Engine time: 4,899 hours
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Bearing
- Part number: M25010354
- Part serial: FAG111065
- Condition: Broken
- Location: Compressor
- Part time: 3 hours
- Component: Compressor
- Component part number: 23065593
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEEA2011121132678

## Discrepancy

PILOT REPORTED A CHIP LIGHT AFTER TAKEOFF.  AS ACFT WAS TURNING A BASE LEG FOR LANDING AT EC278B.  A LOUD WHINING NOISE WAS HEARD FOLLOWED BY A LOUD POPPING NOISE AND A YAW.  COMPLETED A SUCCESSFUL WATER LANDING.  TEARDOWN INSPECTION REVEALED 25 PERCENT OF NR 2 BEARING OUTER RACE BROKEN INTO PIECES WITH 1 BALL EXITING THE SEPERATOR, METAL TRANSFERRANCE AND HEAT DISCOLORATION ON BALLS AND INNER RACES.  25 PERCENT OF REAR SUPPORT BEARING BORE BROKEN OFF FROM FORWARD BEARING FLANGE REARWARD WITH A CRACK AND GOUGING AT THE FLANGE.    PARTS RETURNED TO MFG FOR FAILURE INVESTIGATION.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.